EP 1449821 B1 20120509 - OPTICALLY ACTIVE MANDELIC ACID AND ITS DERIVATIVE, AND METHOD FOR CRYSTALLIZATION THEREOF
Title (en)
OPTICALLY ACTIVE MANDELIC ACID AND ITS DERIVATIVE, AND METHOD FOR CRYSTALLIZATION THEREOF
Title (de)
"OPTISCH AKTIVE MANDELS URE UND DEREN DERIVATE, UND VERFAHREN ZU DEREN KRISTALLISIERUNG"
Title (fr)
ACIDE MANDELIQUE OPTIQUEMENT ACTIF ET SON DERIVE, ET PROCEDE DE CRISTALLISATION CORRESPONDANT
Publication
Application
Priority
- JP 0212514 W 20021129
- JP 2001366468 A 20011130
Abstract (en)
[origin: EP1449821A1] A method of crystallizing optically active mandelic acids characterized in that it comprises adding alkali to an aqueous solution comprising optically active mandelic acids and mineral acid for partial neutralization, and then crystallizing the optically active mandelic acids from the aforementioned aqueous solution.
IPC 8 full level
C07C 51/43 (2006.01); C07B 63/00 (2006.01); C07C 59/13 (2006.01); C07C 59/135 (2006.01)
CPC (source: EP US)
C07C 51/43 (2013.01 - EP US); C07B 2200/07 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB LI NL
DOCDB simple family (publication)
EP 1449821 A1 20040825; EP 1449821 A4 20060419; EP 1449821 B1 20120509; AT E556996 T1 20120515; US 2004242693 A1 20041202; WO 03045888 A1 20030605
DOCDB simple family (application)
EP 02785982 A 20021129; AT 02785982 T 20021129; JP 0212514 W 20021129; US 47033503 A 20030728